Is what was stated in Ibn Hajar's "Al-Isabah" regarding Abu Al-Kunood accurate, and can it be inferred from it that the Prophet adopted the crescent moon as an emblem?

What Al-Hafiz mentioned in Abu Al-Kunoud's biography about adopting the crescent as an emblem is not correct, for Amr ibn Zuhair is unknown and could not have met Abu Al-Kunoud. Furthermore, Sa'id ibn Ufair – the narrator of the report – did not narrate from any of the Tabi'in. Thus, the report is mu'dal (perplexing, disconnected) and weak, and cannot be used as proof.

Moreover, adopting the crescent as an emblem has no basis in Islamic Law (Sharia) and was not known during the time of the Prophet, peace be upon him, nor during the era of the Companions or the Tabi'in. It has been mentioned that this symbol was adopted by Muslims from others, as the Ottoman sultans took it as an official mark, following the Caesars who inherited it from the people of Constantinople, who had adopted it to commemorate their repelling of Alexander the Great's attack.

It was also said that some Muslims placed the crescent on minarets in imitation of Christians who placed the cross on their places of worship. Therefore, crescents should not be placed on the tops of minarets due to this doubt and the waste of money and time involved.